3. No withdrawal for permethrin as far as I know...might be on label as I believe it's approved for poultry.I did just read through the whole thing, duh, why didn't I do THAT before.
My cost question was answered and it looks like you do need to get under the feathers?
I skimmed bcuz I am in a hurry but I don't think I saw an answer for 3, 4, and 5 tho
~Abby
4. Every 7-10 days until no active bugs are seen...directions are on label.
5. Depends on your definition of 'natural'. I believe most permethrins are approved under 'organic' guidelines.